Frame shifting apparatus



July 26, 1949. l. J. KUERT FRAME SII'IIFTING APPARATUS Filedpril 14,1947 n Jj/7g?. 1.

v INVENTOR. ffA. J fr/M7 Arrow/fr E Patented July 26, 1949 UNITED STATESPATENT f OFFICE FRAME SHIFTING APPARATUS Ira J. Kuert, San Gabriel,Calif.

Application April 14, 1947, Serial No. 741,371

1 Claim.

This invention relates to a frame shifting apparatus.

The general object of the invention is to provide a novel shiftingmechanism for a frame such as a frame for a mobile tower.

A more specic object of the invention is to provide a novel arrangementof pulley members mounted on a wheeled frame which supports a cablewinding mechanism and wherein a cable operable by the winding mechanism'passes over the pulley members in such a manner that the frame will beshifted by movement of the cable.

Other objects and advantages of my invention will be apparent from thefollowing description taken in connection with the accompanyingdrawings, wherein:

Fig. 1 is a top plan view of a wheeled frame with the upper guide platesfor the pulleys omitted;

Fig. 2 is a section taken on line `2--2, Fig. 1, and

Fig. 3 is a fragmentary view similar to Fig. 1, showing the shiftingoperation.

Referring to the drawing by reference characters, I have shown myinvention as embodied in a frame I which may be the frame of a concretehandling apparatus such as shown in m'y copending application Serial No.741,370, led April 14, 1947.

The frame includes side members II and end members I2, with supportingwheels I3 mounted on axles I4 disposed intermediate the length of thesides II. At the corners the frame is shown as provided with casterwheels I5 which are mounted on brackets I5' secured to the frame I0.

The end members I2 are each provided with a projecting support shown asan angleI member I6 held in place as by rivets I1. As shown, the anglemembers I6 extend the full width of the ends I2 and at each end of theangle members I6 I provide a pulley, I'8a, Ib, I8c and IBd,respectively. Mounted on shafts I9 and intermediate the length of eachangle member I6 at one end I provide a pair of pulleys 2I and 22 and atthe other end a pair of pulleys 2l' and 22. Each pulley includes upperand lower guide plates 23 and 24.

Mounted on the frame adjacent one of the end members I2, I show a shaft25 supporting a drum 26 which may be driven in either direction bysuitable drive means 21 which forms no part of the present invention.

A cable 30 is wrapped about the drum 26. One end member I2 is providedwith a hole 3l for the cable. The cable passes from the drum over aroller 3I and around the pulleys 2I and 22, as shown in Fig. 1, and issecured to a stake or other xe'd member 32. When the drum 26 is rotatedin a clockwise direction, in Fig. 2, the frame I0 will be pulled in aforward direction towards the stake 32.

In order to shift the frame abruptly from the solid line position shownin Fig. 3 to the dotted line position shown in this ligure, the cable 30is run from the pulley 2I` around the pulley I8a as shown in Fig. 3.With this arrangement, when the drum is operated the frame I0 will beabruptly shifted to the dotted line position shown in Fig. 3.

For an abrupt shifting in a direction in reverse to that shown in Fig.3, the cable 30 is run over the pulleys 2| and 22 as shown in Fig. 1 andis then run over the pulley I8b and thence to the stake 32, whereuponoperation of the drum 26 will abruptly move the frame I0 opposite' tothe dotted line position shown in Fig. 3.

To move the frame in a direction opposite to that just described, thecable is released from the stake 32 and another cable 30 on the samedrum is run from the drum 26 towards the other end of the frame I0. Thecable 30' first passes* over a pulley 35 then over a pulley 36 andthence over the pulleys 2| or 22 to an anchor (not shown) for a straightrearward movement of the frame.

The pulley 35 is mounted adjacent to a transverse member 31 on the frameand the pulley 36 is mounted beneath the transverse member 31. In thisway the cable 3B is led around the space A in which depending portionsof mechanism might be arranged.

To move the frame rearwardly and abruptly in one direction, the cable 30is arranged so that it passes from the pulley 36 onto the pulley I8c andthence to the anchor; and to move the frame rearwardly and abruptly inthe other direction, the cable is run over pulleys 36, 2I', 22 and thenover pulley IBd and thence to the anchor.

The member 3l has a hole (not shown) similar to the hole 3| throughwhich the cable 30 passes.

The pulleys 22 and 22 are so arranged that the cables 30 and 30' whenrunning thereover and thence to the anchor have their pulling effectalong the longitudinal axis of the frame II.

From the foregoing description, it will be apparent that I have inventeda novel frame shifting apparatus which is extremely simple in operationand is easily constructed and assembled.

Having thus described my invention, I claim:

In a shifting apparatus, a frame including side and end members, atransverse support member extending from each end of the frame, a pairof pulleys on each support member, one of the previously mentionedpulleys being disposed at each corner of the frame, a pair of pulleysdis- 3 posedcn each support member and between the adjacent cornerpulleys, a drum on said frame, a cable on the drum, said cable beingadapted to be passed selectively over the pulleys at one end of theframe, a second cable on the drum, a pulley intermediate the length ofthe frame and adapted to receive said second cable, and another pulleyarranged laterally of said last mentioned pulley and adaptedto receivethe second cable, thesecond cable being adapted to be ledfrom saidlaterally arranged pulley selectively over the pul leys at the otherend'of the frame. ;y

REFERENCES CITED The following references are of record in the flle ofthis patent:

UNITEJD STATES PATENTS Number IRAKUEBT' i Levin l r May 17, 1921

